Sighted user here. The blind sub-reddit tends to be fairly empty, my guess is due to the difficulty of making its format accessible to basic screen-readers. Anyways, even though I'm sighted, I'll throw my two cents in.
There is a market for blind individuals out who enjoy gaming, but probably the majority of the population is used to being largely ignored by the game industry. Because of this, even if you are able to make a successful, accessible audiogame, you may have a hard time finding users. That's not to say that they're not out there, however, and it's not to say that you shouldn't seek them out!
If you're interested in the subject of audiogames, I'd refer you to
$1. It mostly profiles an audiogame called *Swamp* (the article says, "You can think of it as Left 4 Dead for the blind"), but also touches on some larger themes of what it means to be blind in a sighted-gamers world.
If you're a software developer and you want to make accessible products you should really make sure you have a good grasp of at least two technologies - JAWS (PC), and VoiceOver (Apple). Macbooks have another screen-reader built into them, I think, but I have no experience using it, nor do I have experience using the Android screen-reader.
I hope some of this info is helpful, usually I'm just a lurker on /r/blind, but I hate seeing quality questions go unanswered here.